. >> and this is the most energy efficient government building in the united states today, if not the world. and it is an example that the entire united states can look to and say, that's what we need to do to save our city hundreds of millions of dollars in energy consumption a year and set an example to everybody of how to save energy, to be green, to be sustainable, to be responsible. the city is leading the way. >> it will be immediately recognizable and iconic from various parts of the city or even if you see a picture. that's the sfpuc building. it's a wonderful building. ♪ ♪ >> in this fabulously beautiful persidio national park and near golden gate and running like a scar is this ugly highway. that was built in 1936 at the same time as the bridge and at that time the presidio was an army and they didn't want civilians on their turf. and the road was built high. >> we need access and you have a 70 year-old facility that's inadequate for today's transportation needs. and in addition to that, you have the problem that it wasn't for site extenders. >> the rating for the high v